Calcultate the value of current I in the following figure.

Explanation

Applying Kirchhoff.s First law at the junction we get
`3.25 + 3.25 - 3.5 - 1.5 + 3.75 + 1 = 0`
` 6.5 - 5 + 3.75 + I = 0`
` :." I" = - 5.25`